1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.329 2004/07/13 18:13:46 sakharuk Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40:
41: package Apache::lonxml;
42: use vars
43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount @htmlareafields);
44: use strict;
45: use HTML::LCParser();
46: use HTML::TreeBuilder();
47: use HTML::Entities();
48: use Safe();
49: use Safe::Hole();
50: use Math::Cephes();
51: use Math::Random();
52: use Opcode();
53: use POSIX qw(strftime);
54:
55:
56: sub register {
57: my ($space,@taglist) = @_;
58: foreach my $temptag (@taglist) {
59: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
60: }
61: }
62:
63: sub deregister {
64: my ($space,@taglist) = @_;
65: foreach my $temptag (@taglist) {
66: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
67: if ($tempspace eq $space) {
68: pop(@{ $Apache::lonxml::alltags{$temptag} });
69: }
70: }
71: #&printalltags();
72: }
73:
74: use Apache::Constants qw(:common);
75: use Apache::lontexconvert();
76: use Apache::style();
77: use Apache::run();
78: use Apache::londefdef();
79: use Apache::scripttag();
80: use Apache::languagetags();
81: use Apache::edit();
82: use Apache::inputtags();
83: use Apache::outputtags();
84: use Apache::lonnet();
85: use Apache::File();
86: use Apache::loncommon();
87: use Apache::lonfeedback();
88: use Apache::lonmsg();
89: use Apache::loncacc();
90: use Apache::lonlocal;
91:
92: #================================================== Main subroutine: xmlparse
93: #debugging control, to turn on debugging modify the correct handler
94: $Apache::lonxml::debug=0;
95:
96: # keeps count of the number of warnings and errors generated in a parse
97: $warningcount=0;
98: $errorcount=0;
99:
100: #path to the directory containing the file currently being processed
101: @pwd=();
102:
103: #these two are used for capturing a subset of the output for later processing,
104: #don't touch them directly use &startredirection and &endredirection
105: @outputstack = ();
106: $redirection = 0;
107:
108: #controls wheter the <import> tag actually does
109: $import = 1;
110: @extlinks=();
111:
112: # meta mode is a bit weird only some output is to be turned off
113: #<output> tag turns metamode off (defined in londefdef.pm)
114: $metamode = 0;
115:
116: # turns on and of run::evaluate actually derefencing var refs
117: $evaluate = 1;
118:
119: # data structure for eidt mode, determines what tags can go into what other tags
120: %insertlist=();
121:
122: # stores the list of active tag namespaces
123: @namespace=();
124:
125: # has the dynamic menu been updated to know about this resource
126: $Apache::lonxml::registered=0;
127:
128: # a pointer the the Apache request object
129: $Apache::lonxml::request='';
130:
131: # a problem number counter, and check on ether it is used
132: $Apache::lonxml::counter=1;
133: $Apache::lonxml::counter_changed=0;
134:
135: #internal check on whether to look at style defs
136: $Apache::lonxml::usestyle=1;
137:
138: #locations used to store the parameter string for style substitutions
139: $Apache::lonxml::style_values='';
140: $Apache::lonxml::style_end_values='';
141:
142: #array of ssi calls that need to occur after we are done parsing
143: @Apache::lonxml::ssi_info=();
144:
145: #should we do the postag variable interpolation
146: $Apache::lonxml::post_evaluate=1;
147:
148: #a header message to emit in the case of any generated warning or errors
149: $Apache::lonxml::warnings_error_header='';
150:
151: sub xmlbegin {
152: my $output='';
153: @htmlareafields=();
154: if ($ENV{'browser.mathml'}) {
155: $output='<?xml version="1.0"?>'
156: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
157: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
158: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
159: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
160: .'xmlns="http://www.w3.org/TR/REC-html40">';
161: } else {
162: $output='<html>';
163: }
164: return $output;
165: }
166:
167: sub xmlend {
168: my $mode='xml';
169: my $status='OPEN';
170: if ($Apache::lonhomework::parsing_a_problem) {
171: $mode='problem';
172: $status=$Apache::inputtags::status[-1];
173: }
174: return &Apache::lonfeedback::list_discussion($mode,$status).'</html>';
175: }
176:
177: sub tokeninputfield {
178: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
179: $defhost=~tr/a-z/A-Z/;
180: return (<<ENDINPUTFIELD)
181: <script type="text/javascript">
182: function updatetoken() {
183: var comp=new Array;
184: var barcode=unescape(document.tokeninput.barcode.value);
185: comp=barcode.split('*');
186: if (typeof(comp[0])!="undefined") {
187: document.tokeninput.codeone.value=comp[0];
188: }
189: if (typeof(comp[1])!="undefined") {
190: document.tokeninput.codetwo.value=comp[1];
191: }
192: if (typeof(comp[2])!="undefined") {
193: comp[2]=comp[2].toUpperCase();
194: document.tokeninput.codethree.value=comp[2];
195: }
196: document.tokeninput.barcode.value='';
197: }
198: </script>
199: <form method="post" name="tokeninput">
200: <table border="2" bgcolor="#FFFFBB">
201: <tr><th>DocID Checkin</th></tr>
202: <tr><td>
203: <table>
204: <tr>
205: <td>Scan in Barcode</td>
206: <td><input type="text" size="22" name="barcode"
207: onChange="updatetoken()"/></td>
208: </tr>
209: <tr><td><i>or</i> Type in DocID</td>
210: <td>
211: <input type="text" size="5" name="codeone" />
212: <b><font size="+2">*</font></b>
213: <input type="text" size="5" name="codetwo" />
214: <b><font size="+2">*</font></b>
215: <input type="text" size="10" name="codethree" value="$defhost"
216: onChange="this.value=this.value.toUpperCase()" />
217: </td></tr>
218: </table>
219: </td></tr>
220: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
221: </table>
222: </form>
223: ENDINPUTFIELD
224: }
225:
226: sub maketoken {
227: my ($symb,$tuname,$tudom,$tcrsid)=@_;
228: unless ($symb) {
229: $symb=&Apache::lonnet::symbread();
230: }
231: unless ($tuname) {
232: $tuname=$ENV{'user.name'};
233: $tudom=$ENV{'user.domain'};
234: $tcrsid=$ENV{'request.course.id'};
235: }
236:
237: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
238: }
239:
240: sub printtokenheader {
241: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
242: unless ($token) { return ''; }
243:
244: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
245: unless ($tsymb) {
246: $tsymb=$symb;
247: }
248: unless ($tuname) {
249: $tuname=$name;
250: $tudom=$domain;
251: $tcrsid=$courseid;
252: }
253:
254: my %reply=&Apache::lonnet::get('environment',
255: ['firstname','middlename','lastname','generation'],
256: $tudom,$tuname);
257: my $plainname=$reply{'firstname'}.' '.
258: $reply{'middlename'}.' '.
259: $reply{'lastname'}.' '.
260: $reply{'generation'};
261:
262: if ($target eq 'web') {
263: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
264: return
265: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
266: &mt('Checked out for').' '.$plainname.
267: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
268: '<br />'.&mt('ID').': '.$idhash{$tuname}.
269: '<br />'.&mt('CourseID').': '.$tcrsid.
270: '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
271: '<br />'.&mt('DocID').': '.$token.
272: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
273: } else {
274: return $token;
275: }
276: }
277:
278: sub fontsettings() {
279: my $headerstring='';
280: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
281: $headerstring.=
282: '<meta Content-Type="text/html; charset=x-mac-roman">';
283: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
284: $headerstring.=
285: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
286: }
287: return $headerstring;
288: }
289:
290: sub printalltags {
291: my $temp;
292: foreach $temp (sort keys %Apache::lonxml::alltags) {
293: &Apache::lonxml::debug("$temp -- ".
294: join(',',@{ $Apache::lonxml::alltags{$temp} }));
295: }
296: }
297:
298: sub xmlparse {
299: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
300:
301: &setup_globals($request,$target);
302: &Apache::inputtags::initialize_inputtags();
303: &Apache::outputtags::initialize_outputtags();
304: &Apache::edit::initialize_edit();
305: &Apache::londefdef::initialize_londefdef();
306:
307: #
308: # do we have a course style file?
309: #
310:
311: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
312: my $bodytext=
313: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
314: if ($bodytext) {
315: my $location=&Apache::lonnet::filelocation('',$bodytext);
316: my $styletext=&Apache::lonnet::getfile($location);
317: if ($styletext ne '-1') {
318: %style_for_target = (%style_for_target,
319: &Apache::style::styleparser($target,$styletext));
320: }
321: }
322: } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
323: my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
324: my $styletext=&Apache::lonnet::getfile($location);
325: if ($styletext ne '-1') {
326: %style_for_target = (%style_for_target,
327: &Apache::style::styleparser($target,$styletext));
328: }
329: }
330: #&printalltags();
331: my @pars = ();
332: my $pwd=$ENV{'request.filename'};
333: $pwd =~ s:/[^/]*$::;
334: &newparser(\@pars,\$content_file_string,$pwd);
335:
336: my $safeeval = new Safe;
337: my $safehole = new Safe::Hole;
338: &init_safespace($target,$safeeval,$safehole,$safeinit);
339: #-------------------- Redefinition of the target in the case of compound target
340:
341: ($target, my @tenta) = split('&&',$target);
342:
343: my @stack = ();
344: my @parstack = ();
345: &initdepth;
346:
347: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
348: $safeeval,\%style_for_target);
349:
350: if ($ENV{'request.uri'}) {
351: &writeallows($ENV{'request.uri'});
352: }
353: &do_registered_ssi();
354: if ($Apache::lonxml::counter_changed) { &store_counter() }
355: return $finaloutput;
356: }
357:
358: sub htmlclean {
359: my ($raw,$full)=@_;
360:
361: my $tree = HTML::TreeBuilder->new;
362: $tree->ignore_unknown(0);
363:
364: $tree->parse($raw);
365:
366: my $output= $tree->as_HTML(undef,' ');
367:
368: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
369: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
370: unless ($full) {
371: $output=~s/\<[\/]*(body|head|html)\>//gis;
372: }
373:
374: $tree = $tree->delete;
375:
376: return $output;
377: }
378:
379: sub latex_special_symbols {
380: my ($string,$where)=@_;
381: if ($where eq 'header') {
382: $string =~ s/(\\|_|\^)/ /g;
383: $string =~ s/(\$|%|\{|\})/\\$1/g;
384: $string =~ s/_/ /g;
385: $string=&Apache::lonprintout::character_chart($string);
386: # any & or # leftover should be safe to just escape
387: $string=~s/([^\\])\&/$1\\\&/g;
388: $string=~s/([^\\])\#/$1\\\#/g;
389: } else {
390: $string=~s/\\/\\ensuremath{\\backslash}/g;
391: $string=~s/([^\\]|^)\%/$1\\\%/g;
392: $string=~s/([^\\]|^)\$/$1\\\$/g;
393: $string=~s/([^\\])\_/$1\\_/g;
394: $string=~s/\$\$/\$\\\$/g;
395: $string=~s/\_\_/\_\\\_/g;
396: $string=~s/\#\#/\#\\\#/g;
397: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
398: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
399: $string=&Apache::lonprintout::character_chart($string);
400: # any & or # leftover should be safe to just escape
401: $string=~s/([^\\]|^)\&/$1\\\&/g;
402: $string=~s/([^\\]|^)\#/$1\\\#/g;
403: #single { or } How to escape?
404: }
405: return $string;
406: }
407:
408: sub inner_xmlparse {
409: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
410: my $finaloutput = '';
411: my $result;
412: my $token;
413: my $dontpop=0;
414: while ( $#$pars > -1 ) {
415: while ($token = $$pars['-1']->get_token) {
416: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
417: if ($metamode<1) {
418: my $text=$token->[1];
419: if ($token->[0] eq 'C' && $target eq 'tex') {
420: $text = '';
421: # $text = '%'.$text."\n";
422: }
423: $result.=$text;
424: }
425: } elsif (($token->[0] eq 'D')) {
426: if ($metamode<1 && $target eq 'web') {
427: my $text=$token->[1];
428: $result.=$text;
429: }
430: } elsif ($token->[0] eq 'PI') {
431: if ($metamode<1 && $target eq 'web') {
432: $result=$token->[2];
433: }
434: } elsif ($token->[0] eq 'S') {
435: # add tag to stack
436: push (@$stack,$token->[1]);
437: # add parameters list to another stack
438: push (@$parstack,&parstring($token));
439: &increasedepth($token);
440: if ($Apache::lonxml::usestyle &&
441: exists($$style_for_target{$token->[1]})) {
442: $Apache::lonxml::usestyle=0;
443: my $string=$$style_for_target{$token->[1]}.
444: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
445: &Apache::lonxml::newparser($pars,\$string);
446: $Apache::lonxml::style_values=$$parstack[-1];
447: $Apache::lonxml::style_end_values=$$parstack[-1];
448: } else {
449: $result = &callsub("start_$token->[1]", $target, $token, $stack,
450: $parstack, $pars, $safeeval, $style_for_target);
451: }
452: } elsif ($token->[0] eq 'E') {
453: if ($Apache::lonxml::usestyle &&
454: exists($$style_for_target{'/'."$token->[1]"})) {
455: $Apache::lonxml::usestyle=0;
456: my $string=$$style_for_target{'/'.$token->[1]}.
457: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
458: &Apache::lonxml::newparser($pars,\$string);
459: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
460: $Apache::lonxml::style_end_values='';
461: $dontpop=1;
462: } else {
463: #clear out any tags that didn't end
464: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
465: my $lasttag=$$stack[-1];
466: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
467: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
468: last;
469: } else {
470: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
471: &end_tag($stack,$parstack,$token);
472: }
473: }
474: $result = &callsub("end_$token->[1]", $target, $token, $stack,
475: $parstack, $pars,$safeeval, $style_for_target);
476: }
477: } else {
478: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
479: }
480: #evaluate variable refs in result
481: if ($Apache::lonxml::post_evaluate &&$result ne "") {
482: my $extras;
483: if (!$Apache::lonxml::usestyle) {
484: $extras=$Apache::lonxml::style_values;
485: }
486: if ( $#$parstack > -1 ) {
487: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
488: } else {
489: $result= &Apache::run::evaluate($result,$safeeval,$extras);
490: }
491: }
492: $Apache::lonxml::post_evaluate=1;
493:
494: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
495: #Style file definitions should be correct
496: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
497: $result=&latex_special_symbols($result);
498: }
499: }
500:
501: if ($Apache::lonxml::redirection) {
502: $Apache::lonxml::outputstack['-1'] .= $result;
503: } else {
504: $finaloutput.=$result;
505: }
506: $result = '';
507:
508: if ($token->[0] eq 'E' && !$dontpop) {
509: &end_tag($stack,$parstack,$token);
510: }
511: $dontpop=0;
512: }
513: if ($#$pars > -1) {
514: pop @$pars;
515: pop @Apache::lonxml::pwd;
516: }
517: }
518:
519: # if ($target eq 'meta') {
520: # $finaloutput.=&endredirection;
521: # }
522:
523:
524: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
525: $finaloutput=&afterburn($finaloutput);
526: }
527: return $finaloutput;
528: }
529:
530: ##
531: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
532: ## otherwise do not call it as we do not know what it is.
533: ##
534: sub callsub {
535: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
536: my $currentstring='';
537: my $nodefault;
538: {
539: my $sub1;
540: no strict 'refs';
541: my $tag=$token->[1];
542: # get utterly rid of extended html tags
543: if ($tag=~/^x\-/i) { return ''; }
544: my $space=$Apache::lonxml::alltags{$tag}[-1];
545: if (!$space) {
546: $tag=~tr/A-Z/a-z/;
547: $sub=~tr/A-Z/a-z/;
548: $space=$Apache::lonxml::alltags{$tag}[-1]
549: }
550:
551: my $deleted=0;
552: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
553: if (($token->[0] eq 'S') && ($target eq 'modified')) {
554: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
555: $parstack,$parser,$safeeval,
556: $style);
557: }
558: if (!$deleted) {
559: if ($space) {
560: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
561: $sub1="$space\:\:$sub";
562: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
563: $parstack,$parser,$safeeval,
564: $style);
565: } else {
566: if ($target eq 'tex') {
567: # throw away tag name
568: return '';
569: }
570: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
571: if ($metamode <1) {
572: if (defined($token->[4]) && ($metamode < 1)) {
573: $currentstring = $token->[4];
574: } else {
575: $currentstring = $token->[2];
576: }
577: }
578: }
579: # &Apache::lonxml::debug("nodefalt:$nodefault:");
580: if ($currentstring eq '' && $nodefault eq '') {
581: if ($target eq 'edit') {
582: #&Apache::lonxml::debug("doing default edit for $token->[1]");
583: if ($token->[0] eq 'S') {
584: $currentstring = &Apache::edit::tag_start($target,$token);
585: } elsif ($token->[0] eq 'E') {
586: $currentstring = &Apache::edit::tag_end($target,$token);
587: }
588: } elsif ($target eq 'modified') {
589: if ($token->[0] eq 'S') {
590: $currentstring = $token->[4];
591: $currentstring.=&Apache::edit::handle_insert();
592: } elsif ($token->[0] eq 'E') {
593: $currentstring = $token->[2];
594: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
595: } else {
596: $currentstring = $token->[2];
597: }
598: }
599: }
600: }
601: use strict 'refs';
602: }
603: return $currentstring;
604: }
605:
606: sub setup_globals {
607: my ($request,$target)=@_;
608: $Apache::lonxml::request=$request;
609: $Apache::lonxml::registered = 0;
610: @Apache::lonxml::htmlareafields=();
611: $errorcount=0;
612: $warningcount=0;
613: $Apache::lonxml::default_homework_loaded=0;
614: $Apache::lonxml::usestyle=1;
615: &init_counter();
616: @Apache::lonxml::pwd=();
617: @Apache::lonxml::extlinks=();
618: @Apache::lonxml::ssi_info=();
619: $Apache::lonxml::post_evaluate=1;
620: $Apache::lonxml::warnings_error_header='';
621: if ($target eq 'meta') {
622: $Apache::lonxml::redirection = 0;
623: $Apache::lonxml::metamode = 1;
624: $Apache::lonxml::evaluate = 1;
625: $Apache::lonxml::import = 0;
626: } elsif ($target eq 'answer') {
627: $Apache::lonxml::redirection = 0;
628: $Apache::lonxml::metamode = 1;
629: $Apache::lonxml::evaluate = 1;
630: $Apache::lonxml::import = 1;
631: } elsif ($target eq 'grade') {
632: &startredirection;
633: $Apache::lonxml::metamode = 0;
634: $Apache::lonxml::evaluate = 1;
635: $Apache::lonxml::import = 1;
636: } elsif ($target eq 'modified') {
637: $Apache::lonxml::redirection = 0;
638: $Apache::lonxml::metamode = 0;
639: $Apache::lonxml::evaluate = 0;
640: $Apache::lonxml::import = 0;
641: } elsif ($target eq 'edit') {
642: $Apache::lonxml::redirection = 0;
643: $Apache::lonxml::metamode = 0;
644: $Apache::lonxml::evaluate = 0;
645: $Apache::lonxml::import = 0;
646: } elsif ($target eq 'analyze') {
647: $Apache::lonxml::redirection = 0;
648: $Apache::lonxml::metamode = 0;
649: $Apache::lonxml::evaluate = 1;
650: $Apache::lonxml::import = 1;
651: } else {
652: $Apache::lonxml::redirection = 0;
653: $Apache::lonxml::metamode = 0;
654: $Apache::lonxml::evaluate = 1;
655: $Apache::lonxml::import = 1;
656: }
657: }
658:
659: sub init_safespace {
660: my ($target,$safeeval,$safehole,$safeinit) = @_;
661: $safeeval->permit("entereval");
662: $safeeval->permit(":base_math");
663: $safeeval->permit("sort");
664: $safeeval->permit("time");
665: $safeeval->deny(":base_io");
666: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
667: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
668: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
669: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
670: '&chem_standard_order');
671:
672: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
673: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
674: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
675: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
676: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
677: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
678: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
679: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
680: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
681: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
682: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
683: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
684: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
685: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
686: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
687: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
688: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
689: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
690: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
691:
692: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
693: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
694: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
695: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
696: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
697: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
698: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
699: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
700: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
701: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
702: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
703: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
704: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
705: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
706: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
707: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
708: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
709: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
710: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
711: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
712: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
713: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
714:
715: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
716: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
717: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
718: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
719: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
720: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
721:
722: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
723: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
724: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
725: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
726: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
727: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
728: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
729: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
730: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
731: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
732: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
733: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
734: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
735: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
736: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
737: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
738: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
739: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
740: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
741: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
742: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
743: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
744: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
745: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
746:
747: #need to inspect this class of ops
748: # $safeeval->deny(":base_orig");
749: $safeinit .= ';$external::target="'.$target.'";';
750: my $rndseed;
751: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
752: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
753: $safeinit .= ';$external::randomseed="'.$rndseed.'";';
754: &Apache::lonxml::debug("Setting rndseed to $rndseed");
755: &Apache::run::run($safeinit,$safeeval);
756:
757: my $subroutine=<<'EVALUATESUB';
758: sub __LC_INTERNAL_EVALUATE__ {
759: my ($__LC__a,$__LC__b,$__LC__c)=@_;
760: my $__LC__prefix;
761: while(1){
762: {
763: use strict;
764: no strict "vars";
765: if (eval(defined(eval($__LC__a.$__LC__b)))) {
766: return $__LC__prefix.eval($__LC__a.$__LC__b.$__LC__c);
767: }
768: }
769: $__LC__prefix.=substr($__LC__a,0,1,"");
770: if ($__LC__a!~/^(\$|&|\#)/) { last; }
771: }
772: return $__LC__prefix.$__LC__a.$__LC__b.$__LC__c;
773: }
774: EVALUATESUB
775: $safeeval->permit("require");
776: $safeeval->reval($subroutine);
777: $safeeval->deny("require");
778: }
779:
780: sub default_homework_load {
781: my ($safeeval)=@_;
782: &Apache::lonxml::debug('Loading default_homework');
783: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
784: if ($default eq -1) {
785: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
786: } else {
787: &Apache::run::run($default,$safeeval);
788: $Apache::lonxml::default_homework_loaded=1;
789: }
790: }
791:
792: my $metamode_was;
793: sub startredirection {
794: if (!$Apache::lonxml::redirection) {
795: $metamode_was=$Apache::lonxml::metamode;
796: }
797: $Apache::lonxml::metamode=0;
798: $Apache::lonxml::redirection++;
799: push (@Apache::lonxml::outputstack, '');
800: }
801:
802: sub endredirection {
803: if (!$Apache::lonxml::redirection) {
804: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
805: return '';
806: }
807: $Apache::lonxml::redirection--;
808: if (!$Apache::lonxml::redirection) {
809: $Apache::lonxml::metamode=$metamode_was;
810: }
811: pop @Apache::lonxml::outputstack;
812: }
813:
814: sub end_tag {
815: my ($tagstack,$parstack,$token)=@_;
816: pop(@$tagstack);
817: pop(@$parstack);
818: &decreasedepth($token);
819: }
820:
821: sub initdepth {
822: @Apache::lonxml::depthcounter=();
823: $Apache::lonxml::depth=-1;
824: $Apache::lonxml::olddepth=-1;
825: }
826:
827: sub increasedepth {
828: my ($token) = @_;
829: $Apache::lonxml::depth++;
830: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
831: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
832: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
833: }
834: my $curdepth=join('_',@Apache::lonxml::depthcounter);
835: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
836: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
837: }
838:
839: sub decreasedepth {
840: my ($token) = @_;
841: $Apache::lonxml::depth--;
842: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
843: $#Apache::lonxml::depthcounter--;
844: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
845: }
846: if ( $Apache::lonxml::depth < -1) {
847: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
848: $Apache::lonxml::depth='-1';
849: }
850: my $curdepth=join('_',@Apache::lonxml::depthcounter);
851: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
852: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
853: }
854:
855: sub get_all_text_unbalanced {
856: #there is a copy of this in lonpublisher.pm
857: my($tag,$pars)= @_;
858: my $token;
859: my $result='';
860: $tag='<'.$tag.'>';
861: while ($token = $$pars[-1]->get_token) {
862: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
863: $result.=$token->[1];
864: } elsif ($token->[0] eq 'PI') {
865: $result.=$token->[2];
866: } elsif ($token->[0] eq 'S') {
867: $result.=$token->[4];
868: } elsif ($token->[0] eq 'E') {
869: $result.=$token->[2];
870: }
871: if ($result =~ /\Q$tag\E/is) {
872: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
873: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
874: #&Apache::lonxml::debug('Result is :'.$1);
875: $redo=$tag.$redo;
876: &Apache::lonxml::newparser($pars,\$redo);
877: last;
878: }
879: }
880: return $result
881: }
882:
883: sub increment_counter {
884: my ($increment) = @_;
885: if (defined($increment) && $increment gt 0) {
886: $Apache::lonxml::counter+=$increment;
887: } else {
888: $Apache::lonxml::counter++;
889: }
890: $Apache::lonxml::counter_changed=1;
891: }
892:
893: sub init_counter {
894: if (defined($ENV{'form.counter'})) {
895: $Apache::lonxml::counter=$ENV{'form.counter'};
896: $Apache::lonxml::counter_changed=0;
897: } else {
898: $Apache::lonxml::counter=1;
899: $Apache::lonxml::counter_changed=1;
900: }
901: }
902:
903: sub store_counter {
904: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
905: return '';
906: }
907:
908: sub get_all_text {
909: my($tag,$pars,$style)= @_;
910: my $gotfullstack=1;
911: if (ref($pars) ne 'ARRAY') {
912: $gotfullstack=0;
913: $pars=[$pars];
914: }
915: if (ref($style) ne 'HASH') {
916: $style={};
917: }
918: my $depth=0;
919: my $token;
920: my $result='';
921: if ( $tag =~ m:^/: ) {
922: my $tag=substr($tag,1);
923: #&Apache::lonxml::debug("have:$tag:");
924: my $top_empty=0;
925: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
926: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
927: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
928: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
929: $result.=$token->[1];
930: } elsif ($token->[0] eq 'PI') {
931: $result.=$token->[2];
932: } elsif ($token->[0] eq 'S') {
933: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
934: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
935: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
936: $result.=$token->[4];
937: } elsif ($token->[0] eq 'E') {
938: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
939: #skip sending back the last end tag
940: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
941: my $string=
942: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
943: $$style{'/'.$token->[1]}.
944: $token->[2].
945: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
946: &Apache::lonxml::newparser($pars,\$string);
947: #&Apache::lonxml::debug("reParsing $string");
948: next;
949: }
950: if ($depth > -1) {
951: $result.=$token->[2];
952: } else {
953: $$pars[-1]->unget_token($token);
954: }
955: }
956: }
957: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
958: if (($depth >=0) && ($#$pars > 0) ) {
959: pop(@$pars);
960: pop(@Apache::lonxml::pwd);
961: }
962: }
963: if ($top_empty && $depth >= 0) {
964: #never found the end tag ran out of text, throw error send back blank
965: &error('Never found end tag for <'.$tag.
966: '> current string <pre>'.
967: &HTML::Entities::encode($result,'<>&"').
968: '</pre>');
969: if ($gotfullstack) {
970: my $newstring='</'.$tag.'>'.$result;
971: &Apache::lonxml::newparser($pars,\$newstring);
972: }
973: $result='';
974: }
975: } else {
976: while ($#$pars > -1) {
977: while ($token = $$pars[-1]->get_token) {
978: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
979: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
980: ($token->[0] eq 'D')) {
981: $result.=$token->[1];
982: } elsif ($token->[0] eq 'PI') {
983: $result.=$token->[2];
984: } elsif ($token->[0] eq 'S') {
985: if ( $token->[1] =~ /^\Q$tag\E$/i) {
986: $$pars[-1]->unget_token($token); last;
987: } else {
988: $result.=$token->[4];
989: }
990: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
991: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
992: } elsif ($token->[0] eq 'E') {
993: $result.=$token->[2];
994: }
995: }
996: if (($#$pars > 0) ) {
997: pop(@$pars);
998: pop(@Apache::lonxml::pwd);
999: } else { last; }
1000: }
1001: }
1002: #&Apache::lonxml::debug("Exit:$result:");
1003: return $result
1004: }
1005:
1006: sub newparser {
1007: my ($parser,$contentref,$dir) = @_;
1008: push (@$parser,HTML::LCParser->new($contentref));
1009: $$parser['-1']->xml_mode('1');
1010: if ( $dir eq '' ) {
1011: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1012: } else {
1013: push (@Apache::lonxml::pwd, $dir);
1014: }
1015: }
1016:
1017: sub parstring {
1018: my ($token) = @_;
1019: my $temp='';
1020: foreach (@{$token->[3]}) {
1021: unless ($_=~/\W/) {
1022: my $val=$token->[2]->{$_};
1023: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1024: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1025: $temp .= "my \$$_=\"$val\";";
1026: }
1027: }
1028: return $temp;
1029: }
1030:
1031: sub writeallows {
1032: unless ($#extlinks>=0) { return; }
1033: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1034: if ($ENV{'httpref.'.$thisurl}) {
1035: $thisurl=$ENV{'httpref.'.$thisurl};
1036: }
1037: my $thisdir=$thisurl;
1038: $thisdir=~s/\/[^\/]+$//;
1039: my %httpref=();
1040: foreach (@extlinks) {
1041: $httpref{'httpref.'.
1042: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1043: }
1044: @extlinks=();
1045: &Apache::lonnet::appenv(%httpref);
1046: }
1047:
1048: sub register_ssi {
1049: my ($url,%form)=@_;
1050: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1051: return '';
1052: }
1053:
1054: sub do_registered_ssi {
1055: foreach my $info (@Apache::lonxml::ssi_info) {
1056: my %form=%{ $info->{'form'}};
1057: my $url=$info->{'url'};
1058: &Apache::lonnet::ssi($url,%form);
1059: }
1060: }
1061: #
1062: # Afterburner handles anchors, highlights and links
1063: #
1064: sub afterburn {
1065: my $result=shift;
1066: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1067: ['highlight','anchor','link']);
1068: if ($ENV{'form.highlight'}) {
1069: foreach (split(/\,/,$ENV{'form.highlight'})) {
1070: my $anchorname=$_;
1071: my $matchthis=$anchorname;
1072: $matchthis=~s/\_+/\\s\+/g;
1073: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1074: }
1075: }
1076: if ($ENV{'form.link'}) {
1077: foreach (split(/\,/,$ENV{'form.link'})) {
1078: my ($anchorname,$linkurl)=split(/\>/,$_);
1079: my $matchthis=$anchorname;
1080: $matchthis=~s/\_+/\\s\+/g;
1081: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1082: }
1083: }
1084: if ($ENV{'form.anchor'}) {
1085: my $anchorname=$ENV{'form.anchor'};
1086: my $matchthis=$anchorname;
1087: $matchthis=~s/\_+/\\s\+/g;
1088: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1089: $result.=(<<"ENDSCRIPT");
1090: <script type="text/javascript">
1091: document.location.hash='$anchorname';
1092: </script>
1093: ENDSCRIPT
1094: }
1095: return $result;
1096: }
1097:
1098: sub storefile {
1099: my ($file,$contents)=@_;
1100: &Apache::lonnet::correct_line_ends(\$contents);
1101: if (my $fh=Apache::File->new('>'.$file)) {
1102: print $fh $contents;
1103: $fh->close();
1104: return 1;
1105: } else {
1106: &warning("Unable to save file $file");
1107: return 0;
1108: }
1109: }
1110:
1111: sub createnewhtml {
1112: my $title=&mt('Title of document goes here');
1113: my $body=&mt('Body of document goes here');
1114: my $filecontents=(<<SIMPLECONTENT);
1115: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml/11/DTD/xhtml11.dtd">
1116: <html>
1117: <head>
1118: <title>$title</title>
1119: </head>
1120: <body bgcolor="#FFFFFF">
1121: $body
1122: </body>
1123: </html>
1124: SIMPLECONTENT
1125: return $filecontents;
1126: }
1127:
1128: sub createnewsty {
1129: my $filecontents=(<<SIMPLECONTENT);
1130: <definetag name="">
1131: <render>
1132: <web></web>
1133: <tex></tex>
1134: </render>
1135: </definetag>
1136: SIMPLECONTENT
1137: return $filecontents;
1138: }
1139:
1140:
1141: sub inserteditinfo {
1142: my ($result,$filecontents,$filetype)=@_;
1143: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1144: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1145: my $xml_help = '';
1146: my $initialize='';
1147: if ($filetype eq 'html') {
1148: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1149: $initialize=&Apache::lonhtmlcommon::htmlareaheaders().(<<FULLPAGE);
1150: <script type="text/javascript">
1151: $addbuttons
1152:
1153: HTMLArea.loadPlugin("FullPage");
1154:
1155: function initDocument() {
1156: var editor=new HTMLArea("filecont",config);
1157: editor.registerPlugin(FullPage);
1158: editor.generate();
1159: }
1160: </script>
1161: FULLPAGE
1162: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1163: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1164: }
1165: my $cleanbut = '';
1166: if ($filetype eq 'html') {
1167: $cleanbut='<input type="submit" name="attemptclean" value="'.
1168: &mt('Save and then attempt to clean HTML').'" />';
1169: }
1170: my $titledisplay=&display_title();
1171: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1172: 'vi' => 'View',
1173: 'ed' => 'Edit');
1174: my $buttons=(<<BUTTONS);
1175: $cleanbut
1176: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1177: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1178: BUTTONS
1179: my $editfooter=(<<ENDFOOTER);
1180: $initialize
1181: <hr />
1182: <a name="editsection" />
1183: <form method="post">
1184: $xml_help
1185: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1186: $buttons<br />
1187: <textarea cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1188: <br />$buttons
1189: <br />
1190: </form>
1191: $titledisplay
1192: </body>
1193: ENDFOOTER
1194: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1195: $result=~s/(\<\/body\>)/$editfooter/is;
1196: return $result;
1197: }
1198:
1199: sub get_target {
1200: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1201: if ( $ENV{'request.state'} eq 'published') {
1202: if ( defined($ENV{'form.grade_target'})
1203: && ($viewgrades == 'F' )) {
1204: return ($ENV{'form.grade_target'});
1205: } elsif (defined($ENV{'form.grade_target'})) {
1206: if (($ENV{'form.grade_target'} eq 'web') ||
1207: ($ENV{'form.grade_target'} eq 'tex') ) {
1208: return $ENV{'form.grade_target'}
1209: } else {
1210: return 'web';
1211: }
1212: } else {
1213: return 'web';
1214: }
1215: } elsif ($ENV{'request.state'} eq 'construct') {
1216: if ( defined($ENV{'form.grade_target'})) {
1217: return ($ENV{'form.grade_target'});
1218: } else {
1219: return 'web';
1220: }
1221: } else {
1222: return 'web';
1223: }
1224: }
1225:
1226: sub handler {
1227: my $request=shift;
1228:
1229: my $target=&get_target();
1230:
1231: $Apache::lonxml::debug=$ENV{'user.debug'};
1232:
1233: if ($ENV{'browser.mathml'}) {
1234: &Apache::loncommon::content_type($request,'text/xml');
1235: } else {
1236: &Apache::loncommon::content_type($request,'text/html');
1237: }
1238: &Apache::loncommon::no_cache($request);
1239: $request->send_http_header;
1240:
1241: return OK if $request->header_only;
1242:
1243:
1244: my $file=&Apache::lonnet::filelocation("",$request->uri);
1245: my $filetype;
1246: if ($file =~ /\.sty$/) {
1247: $filetype='sty';
1248: } else {
1249: $filetype='html';
1250: }
1251: #
1252: # Edit action? Save file.
1253: #
1254: unless ($ENV{'request.state'} eq 'published') {
1255: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1256: if (&storefile($file,$ENV{'form.filecont'})) {
1257: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1258: &mt('Updated').": ".
1259: &Apache::lonlocal::locallocaltime(time).
1260: " </font>");
1261: }
1262: }
1263: }
1264: my %mystyle;
1265: my $result = '';
1266: my $filecontents=&Apache::lonnet::getfile($file);
1267: if ($filecontents eq -1) {
1268: my $bodytag=&Apache::loncommon::bodytag('File Error');
1269: my $fnf=&mt('File not found');
1270: $result=(<<ENDNOTFOUND);
1271: <html>
1272: <head>
1273: <title>$fnf</title>
1274: </head>
1275: $bodytag
1276: <b>$fnf: $file</b>
1277: </body>
1278: </html>
1279: ENDNOTFOUND
1280: $filecontents='';
1281: if ($ENV{'request.state'} ne 'published') {
1282: if ($filetype eq 'sty') {
1283: $filecontents=&createnewsty();
1284: } else {
1285: $filecontents=&createnewhtml();
1286: }
1287: $ENV{'form.editmode'}='Edit'; #force edit mode
1288: }
1289: } else {
1290: unless ($ENV{'request.state'} eq 'published') {
1291: if ($ENV{'form.attemptclean'}) {
1292: $filecontents=&htmlclean($filecontents,1);
1293: }
1294: #
1295: # we are in construction space, see if edit mode forced
1296: &Apache::loncommon::get_unprocessed_cgi
1297: ($ENV{'QUERY_STRING'},['editmode']);
1298: }
1299: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1300: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1301: '',%mystyle);
1302: }
1303: }
1304:
1305: #
1306: # Edit action? Insert editing commands
1307: #
1308: unless ($ENV{'request.state'} eq 'published') {
1309: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1310: my $displayfile=$request->uri;
1311: $displayfile=~s/^\/[^\/]*//;
1312: $result='<html><body bgcolor="#FFFFFF">'.
1313: &Apache::lonxml::message_location().'<h3>'.
1314: $displayfile.
1315: '</h3></body></html>';
1316: $result=&inserteditinfo($result,$filecontents,$filetype);
1317: }
1318: }
1319: if ($filetype eq 'html') { writeallows($request->uri); }
1320:
1321:
1322: &Apache::lonxml::add_messages(\$result);
1323: $request->print($result);
1324:
1325: return OK;
1326: }
1327:
1328: sub display_title {
1329: my $result;
1330: if ($ENV{'request.state'} eq 'construct') {
1331: my $title=&Apache::lonnet::gettitle();
1332: if (!defined($title) || $title eq '') {
1333: $title = $ENV{'request.filename'};
1334: $title = substr($title, rindex($title, '/') + 1);
1335: }
1336: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1337: }
1338: return $result;
1339: }
1340:
1341: sub debug {
1342: if ($Apache::lonxml::debug eq "1") {
1343: $|=1;
1344: my $request=$Apache::lonxml::request;
1345: if (!$request) { $request=Apache->request; }
1346: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1347: # &Apache::lonnet::logthis($_[0]);
1348: }
1349: }
1350:
1351: sub error {
1352: $errorcount++;
1353: my $request=$Apache::lonxml::request;
1354: if (!$request) { $request=Apache->request; }
1355: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1356: # If printing in construction space, put the error inside <pre></pre>
1357: push(@Apache::lonxml::error_messages,
1358: $Apache::lonxml::warnings_error_header.
1359: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1360: $Apache::lonxml::warnings_error_header='';
1361: } else {
1362: push(@Apache::lonxml::error_messages,
1363: "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />");
1364: #notify author
1365: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1366: #notify course
1367: if ( $ENV{'request.course.id'} ) {
1368: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1369: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1370: foreach (keys %users) {
1371: my ($user,$domain) = split(/:/, $_);
1372: &Apache::lonmsg::user_normal_msg($user,$domain,
1373: "Error [$declutter]",join('<br />',@_));
1374: }
1375: }
1376: }
1377: }
1378:
1379: sub warning {
1380: $warningcount++;
1381:
1382: if ($ENV{'form.grade_target'} ne 'tex') {
1383: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1384: my $request=$Apache::lonxml::request;
1385: if (!$request) { $request=Apache->request; }
1386: push(@Apache::lonxml::warning_messages,
1387: $Apache::lonxml::warnings_error_header.
1388: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1389: $Apache::lonxml::warnings_error_header='';
1390: }
1391: }
1392: }
1393:
1394: sub info {
1395: if ($ENV{'form.grade_target'} ne 'tex'
1396: && $ENV{'request.state'} eq 'construct') {
1397: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1398: }
1399: }
1400:
1401: sub message_location {
1402: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1403: }
1404:
1405: sub add_messages {
1406: my ($msg)=@_;
1407: my $result=join(' ',
1408: @Apache::lonxml::info_messages,
1409: @Apache::lonxml::error_messages,
1410: @Apache::lonxml::warning_messages);
1411: undef(@Apache::lonxml::info_messages);
1412: undef(@Apache::lonxml::error_messages);
1413: undef(@Apache::lonxml::warning_messages);
1414: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1415: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1416: }
1417:
1418: sub get_param {
1419: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1420: if ( ! $context ) { $context = -1; }
1421: my $args ='';
1422: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1423: if ( ! $Apache::lonxml::usestyle ) {
1424: $args=$Apache::lonxml::style_values.$args;
1425: }
1426: if ( ! $args ) { return undef; }
1427: if ( $case_insensitive ) {
1428: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1429: return &Apache::run::run("{$args;".'return $'.$param.'}',
1430: $safeeval); #'
1431: } else {
1432: return undef;
1433: }
1434: } else {
1435: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1436: return &Apache::run::run("{$args;".'return $'.$param.'}',
1437: $safeeval); #'
1438: } else {
1439: return undef;
1440: }
1441: }
1442: }
1443:
1444: sub get_param_var {
1445: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1446: if ( ! $context ) { $context = -1; }
1447: my $args ='';
1448: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1449: if ( ! $Apache::lonxml::usestyle ) {
1450: $args=$Apache::lonxml::style_values.$args;
1451: }
1452: &Apache::lonxml::debug("Args are $args param is $param");
1453: if ($case_insensitive) {
1454: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1455: return undef;
1456: }
1457: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1458: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1459: &Apache::lonxml::debug("first run is $value");
1460: if ($value =~ /^[\$\@\%]\w+$/) {
1461: &Apache::lonxml::debug("doing second");
1462: my @result=&Apache::run::run("return $value",$safeeval,1);
1463: if (!defined($result[0])) {
1464: return $value
1465: } else {
1466: if (wantarray) { return @result; } else { return $result[0]; }
1467: }
1468: } else {
1469: return $value;
1470: }
1471: }
1472:
1473: sub register_insert {
1474: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1475: my $i;
1476: my $tagnum=0;
1477: my @order;
1478: for ($i=0;$i < $#data; $i++) {
1479: my $line = $data[$i];
1480: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1481: if ( $line =~ /TABLE/ ) { last; }
1482: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1483: if ($tag) {
1484: $insertlist{"$tagnum.tag"} = $tag;
1485: $insertlist{"$tagnum.description"} = $descrip;
1486: $insertlist{"$tagnum.color"} = $color;
1487: $insertlist{"$tagnum.function"} = $function;
1488: if (!defined($show)) { $show='yes'; }
1489: $insertlist{"$tagnum.show"}= $show;
1490: $insertlist{"$tagnum.helpfile"} = $helpfile;
1491: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1492: $insertlist{"$tag.num"}=$tagnum;
1493: $tagnum++;
1494: }
1495: }
1496: $i++; #skipping TABLE line
1497: $tagnum = 0;
1498: for (;$i < $#data;$i++) {
1499: my $line = $data[$i];
1500: my ($mnemonic,@which) = split(/ +/,$line);
1501: my $tag = $insertlist{"$tagnum.tag"};
1502: for (my $j=0;$j <=$#which;$j++) {
1503: if ( $which[$j] eq 'Y' ) {
1504: if ($insertlist{"$j.show"} ne 'no') {
1505: push(@{ $insertlist{"$tag.which"} },$j);
1506: }
1507: }
1508: }
1509: $tagnum++;
1510: }
1511: }
1512:
1513: sub description {
1514: my ($token)=@_;
1515: my $tagnum;
1516: my $tag=$token->[1];
1517: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1518: my $testtag=$namespace.'::'.$tag;
1519: $tagnum=$insertlist{"$testtag.num"};
1520: if (defined($tagnum)) { last; }
1521: }
1522: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1523: return $insertlist{$tagnum.'.description'};
1524: }
1525:
1526: # Returns a list containing the help file, and the description
1527: sub helpinfo {
1528: my ($token)=@_;
1529: my $tagnum;
1530: my $tag=$token->[1];
1531: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1532: my $testtag=$namespace.'::'.$tag;
1533: $tagnum=$insertlist{"$testtag.num"};
1534: if (defined($tagnum)) { last; }
1535: }
1536: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1537: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1538: }
1539:
1540: # ----------------------------------------------------------------- whichuser
1541: # returns a list of $symb, $courseid, $domain, $name that is correct for
1542: # calls to lonnet functions for this setup.
1543: # - looks for form.grade_ parameters
1544: sub whichuser {
1545: my ($passedsymb)=@_;
1546: my ($symb,$courseid,$domain,$name,$publicuser);
1547: if (defined($ENV{'form.grade_symb'})) {
1548: my $tmp_courseid=$ENV{'form.grade_courseid'};
1549: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1550: if ($allowed) {
1551: $symb=$ENV{'form.grade_symb'};
1552: $courseid=$ENV{'form.grade_courseid'};
1553: $domain=$ENV{'form.grade_domain'};
1554: $name=$ENV{'form.grade_username'};
1555: }
1556: } else {
1557: if (!$passedsymb) {
1558: $symb=&Apache::lonnet::symbread();
1559: } else {
1560: $symb=$passedsymb;
1561: }
1562: $courseid=$ENV{'request.course.id'};
1563: $domain=$ENV{'user.domain'};
1564: $name=$ENV{'user.name'};
1565: if ($name eq 'public' && $domain eq 'public') {
1566: if (!defined($ENV{'form.username'})) {
1567: $ENV{'form.username'}.=time.rand(10000000);
1568: }
1569: $name.=$ENV{'form.username'};
1570: }
1571: }
1572: return ($symb,$courseid,$domain,$name,$publicuser);
1573: }
1574:
1575: 1;
1576: __END__
1577:
1578:
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